-a, --all
       Show all files specified on the command line. By default, only files that are accessed by at least
       one process are shown.

-c     Same as -m option, used for POSIX compatibility.

-f     Silently ignored, used for POSIX compatibility.

-k, --kill
       Kill  processes accessing the file. Unless changed with -SIGNAL, SIGKILL is sent. An fuser process
       never kills itself, but may kill other fuser processes. The  effective  user  ID  of  the  process
       executing fuser is set to its real user ID before attempting to kill.

-i, --interactive
       Ask  the  user for confirmation before killing a process. This option is silently ignored if -k is
       not present too.

-l, --list-signals
       List all known signal names.

-m NAME, --mount NAME
       NAME specifies a file on a mounted file system or a block device that is  mounted.  All  processes
       accessing  files  on  that  file  system  are  listed.   If  a  directory file is specified, it is
       automatically changed to NAME/. to use any file system that might be mounted on that directory.

-M --ismountpoint
       Request will be fulfilled only if NAME specifies a mountpoint.  This  is  an  invaluable  seatbelt
       which prevents you from killing the machine if NAME happens to not be a filesystem.

-w     Kill  only processes which have write access. This option is silently ignored if -k is not present
       too.

-n SPACE, --namespace SPACE
       Select a different name space. The name spaces file (file names,  the  default),  udp  (local  UDP
       ports), and tcp (local TCP ports) are supported. For ports, either the port number or the symbolic
       name can be specified. If there is no ambiguity, the shortcut notation name/Ispace (e.g. 80/tcp  )
       can be used.

-s, --silent
       Silent operation. -u and -v are ignored in this mode.  -a must not be used with -s.

-SIGNAL
       Use  the  specified  signal  instead  of  SIGKILL when killing processes. Signals can be specified
       either by name (e.g. -HUP) or by number (e.g. -1). This option  is  silently  ignored  if  the  -k
       option is not used.

-u, --user
       Append the user name of the process owner to each PID.

-v, --verbose
       Verbose mode. Processes are shown in a ps-like style. The fields PID, USER and COMMAND are similar
       to ps. ACCESS shows how the process accesses  the  file.  Verbose  mode  will  also  show  when  a
       particular file is being access as a mount point, knfs export or swap file. In this case kernel is
       shown instead of the PID.

-V, --version
       Display version information.

-4, --ipv4
       Search only for IPv4 sockets. This option must not be used with the -6  option  and  only  has  an
       effect with the tcp and udp namespaces.

-6, --ipv6
       Search  only  for  IPv6  sockets.  This option must not be used with the -4 option and only has an
       effect with the tcp and udp namespaces.